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a Department of
Paediatrics, South Cleveland Hospital, Marton Road, Middlesbrough
TS4 3BW, UK, b Department of Paediatric Cardiology, Freeman
Hospital, High Heaton, Newcastle upon Tyne NE7 7DN, UK
Correspondence to: Dr Hunter.
Accepted 16
June 1999
AIMS
To correlate the
size and position of isolated ventricular septal defects with closure
rate in a cohort of children with mean follow up of more than six years.
DESIGN
A birth cohort
was identified using the northern region cardiac database. The
following were noted from case notes: defect size, position, means of
closure, and age at closure.
RESULTS
68 children
were identified. 49 defects were small, 14 were moderate, and 5 were
large. 13 cases required surgical closure, including 12 perimembranous
defects. 35 defects closed spontaneously. Nine of the small muscular
defects remained open and five of the small perimembranous defects
remained open. The spontaneous closure rate for muscular defects was
significantly greater than for perimembranous defects. Mean age of
follow up for patients who still have defects is 76 months.
CONCLUSIONS
The
position of a ventricular septal defect is extremely relevant to its
natural history. Perimembranous defects accounted for most of the
moderate and large defects that required surgical intervention. After
more than six years almost a third of all perimembranous and just over
two thirds of all muscular defects closed spontaneously.
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